Skip to main content
An experiment groups everything for one piece of work. Calling haiqu.init("name") in the SDK creates an experiment, and every circuit and job you create after that belongs to it. See Experiment tracking.

​
My Experiments

Open My Experiments in the sidebar to see all your experiments.
  • Search by name, and filter by Visibility (Public, Shared, Private) or Tags. The filters are saved in the page URL, so you can bookmark or share a filtered view.
  • Click a column header to sort by Created, Last activity, Circuits or Jobs.
  • The icon at the end of each row shows who can see the experiment: public, shared or private. Click it to open the share dialog.
  • Use Export to CSV to download the list. To delete experiments, select their rows and click Delete (N).
Deleting an experiment also permanently deletes all its circuits, jobs, comments and artifacts.

​
The experiment page

Click any experiment to open it. The page has a header, tags, a description, artifacts and metrics, then the experiment’s circuits and jobs.

​
Header and tags

  • Click the title to rename the experiment.
  • The Private / Shared / Public button opens the share dialog.
  • Lab Notebook opens the notebook this experiment was run from in Haiqu Lab, when one is linked.
  • Click + next to Tags to add a tag. Use tags to filter My Experiments.

​
Description

The description is a rich-text editor that saves automatically, so you can document what the experiment is for and what you found. Type / to open the block menu. You can add:
  • headings, lists and tables
  • multi-column layouts
  • block and inline equations in LaTeX: type $$E = mc^2$$ on an empty line, or $\epsilon_{2q}$ inside a sentence
  • images up to 2 MB
To comment on part of the description, select text and click Add comment. See Comments.

​
Artifacts and Logged Metrics

What you log from the SDK appears here. How it is shown depends on what you log:
  • Click + next to Artifacts to upload a file of up to 2 MB.
  • Use the … menu on a card to Rename or Delete it. On table cards, Insert into description adds the table to the description.
  • Click a metric name under Logged Metrics to rename it. Hover over a metric to delete it.

​
Experiment Circuits

This table lists every circuit in the experiment: circuits you logged, plus transpiled and compressed versions. Each derived circuit appears under the circuit it came from.
  • The columns show Source, target Device, Estimated Fidelity, Active Qubits, Depth and Gates (2-qubit and total). For depth and gate counts, lower is better: shorter circuits pick up less noise.
  • Estimated Fidelity (0–100%, higher is better) is an estimate made before any run; after a run, the closest measured counterpart is the job’s QPU Quality (see Jobs). Its meaning depends on the source:
    • Transpiled: expected fidelity on the target device, from the device’s noise characteristics.
    • Compressed: how closely the compressed circuit’s state matches the original’s.
    • Data loading: how closely the prepared state matches your data.
    • Circuits you logged yourself show 100%: there is no device or approximation to compare against yet.
  • Filter by name, Source or Device. Click a circuit name or description to edit it.
  • Use the row actions to show the jobs that used this circuit, or open its details page.
Quantum volume plots the selected circuits by 2-qubit depth and active qubits, colored by estimated fidelity. Pick a device in Select device to overlay its quantum volume (the shaded box) and an approximate volumetric frontier. Circuits inside the box or under the frontier are likely to run well on that device; the further a circuit sits beyond the frontier, the more its results degrade. Use the checkboxes in the table to choose which circuits are plotted.

​
Experiment Jobs

This list shows the experiment’s jobs. It has the same columns and actions as All Jobs. Job Comparison plots the selected jobs by QPU quality against CPU Time or QPU Cost.